US3869705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic technique for making multichannel, spatial-carrier-encoded recordings
Assignee: RCA Corp
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Filing: 1972-09-15
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Granted: 1975-03-04
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Expires: 1992-09-15
Abstract
Abstract A line-scanned flying spot of a recorder is intensity modulated by a plurality of amplitude-modulated carrier frequencies all of which are higher than but coherent with the line scan frequency and are characterized in that the division of the respective carrier frequencies by the line-scan frequency yield quotients which are different from each other. Such a technique is suitable for recording a color-encoded scene on a given area of black-andwhite film.
Inventors
- 👤 Dennis Joseph Woywood
- 👤 Stephen Leonard Corsover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:08
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/80; H04N9/82; H04N5/00; H04N5/76; H04N5/84
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
166 words
A multichannel recording system comprising a flying spot recorder, means for generating a number of separate coherent signals having predetermined relative frequencies with respect to each other including a coherent reference signal and a plurality of coherent carrier signals each of which is phase locked with said reference signal, means coupled to said recorder and having said reference signal applied thereto for line-scanning the flying spot of said recorder at a rate proportional to the frequency of and phase locked with said reference signal, said carrier signals each having a frequency which is higher than said line-scan rate and being characterized in that the respective quotients yielded by the division of the frequency of each respective carrier signal by said line-scan rate are different, modulation means for individually amplitude modulating each respective carrier signal with a separate applied channel information signal, and means for applying said amplitudemodulated carrier signals to said recorder for simultaneously intensity modulating said flying spot with all of said amplitudemodulated carrier signals.
Claim 2
Dependent Claim
166 words
A multichannel recording system comprising a flying spot recorder, means for generating a number of separate coherent signals having predetermined relative frequencies with respect to each other including a coherent reference signal and a plurality of coherent carrier signals each of which is phase locked with said reference signal, means coupled to said recorder and having said reference signal applied thereto for line-scanning the flying spot of said recorder at a rate proportional to the frequency of and phase locked with said reference signal, said carrier signals each having a frequency which is higher than said line-scan rate and being characterized in that the respective quotients yielded by the division of the frequency of each respective carrier signal by said line-scan rate are different, modulation means for individually amplitude modulating each respective carrier signal with a separate applied channel information signal, and means for applying said amplitudemodulated carrier signals to said recorder for simultaneously intensity modulating said flying spot with all of said amplitudemodulated carrier signals.
Claim 3
Dependent Claim
30 words
The system defined in claim 1, Wherein said generating means comprises a phase-locked frequency synthesizer for generating said plurality of coherent signals in phase synchronism with an applied sync signal.
Claim 4
Dependent Claim
61 words
The system defined in claim 2, wherein said sync signal originates at and is transmitted as part of a composite signal to said system from a remote location, and wherein said system includes a receiver for receiving said composite signal, and means for separating said sync signal from said received composite signal and applying said separated sync signal to said synthesizer.
Claim 5
Dependent Claim
30 words
The system defined in claim 2, wherein said generating means further includes a master oscillator for generating said sync signal and means for applying said sync signal to said synthesizer.
Claim 6
Dependent Claim
37 words
The system defined in claim 1, wherein said last-named means comprises an adder for intensity modulating said flying spot with a sum signal of said amplitude-modulated carrier signals applied from said modulation means as separate inputs thereto.
Claim 7
Dependent Claim
35 words
The system defined in claim 1, wherein each of said separate channel information signals is a video signal manifesting a different color of a multi-colored scene which has been line scanned at said line-scan rate.
Claim 8
Dependent Claim
82 words
The system defined in claim 6, comprising film-editing means including a plurality of light scanning means and corresponding color separation and detection means for simultaneously deriving a multi-channel set of color-manifesting video signals for each of a plurality corresponding color transparencies, and a signal processor and selector having all of said sets applied as inputs thereto for deriving therefrom a single output set of color-manifesting video signals, said output set being applied to said modulating means as said separate channel information signals.
Claim 9
Independent Claim
119 words
A method for recording a color-encoded scene on a black-and-white recording medium with a flying spot recorder, that scans a given area of said medium at a given line-scan rate, said method comprising the step of intensity-modulating the flying spot of said recorder with a composite signal, wherein said composite signal includes a plurality of simultaneously occurring different amplitude-modulated carrier frequencies each of which corresponds to a different respective color component oF said color-encoded scene, and wherein all of said carrier frequencies are coherent and are higher than but phase-locked with said line-scan rate and are characterized in that the division of the respective carrier frequencies by said line scan rate yield quotients which are different from each other.
Claim 10
Independent Claim
119 words
A method for recording a color-encoded scene on a black-and-white recording medium with a flying spot recorder, that scans a given area of said medium at a given line-scan rate, said method comprising the step of intensity-modulating the flying spot of said recorder with a composite signal, wherein said composite signal includes a plurality of simultaneously occurring different amplitude-modulated carrier frequencies each of which corresponds to a different respective color component oF said color-encoded scene, and wherein all of said carrier frequencies are coherent and are higher than but phase-locked with said line-scan rate and are characterized in that the division of the respective carrier frequencies by said line scan rate yield quotients which are different from each other.
Claim 11
Dependent Claim
114 words
A multichannel-encoded recording on the same area of a black-and-white recording medium in which the encoding is manifested over said area by spatial intensity modulation about a predetermined gray bias level by a predetermined composite modulating signal, said predetermined composite modulating signal comprising separate spatial carriers frequency components each amplitude modulated by a different one of said channels, each spatial carrier frequency component defining a synthetic grating having selected angular orientation and line spacing parameters with at least one of said parameters being different in any one of said spatial carrier frequency components from the parameters of any other of said spatial carrier frequency components, whereby said multichannel-encoded recording does not contain baseband information.
Claim 12
Dependent Claim
114 words
A multichannel-encoded recording on the same area of a black-and-white recording medium in which the encoding is manifested over said area by spatial intensity modulation about a predetermined gray bias level by a predetermined composite modulating signal, said predetermined composite modulating signal comprising separate spatial carriers frequency components each amplitude modulated by a different one of said channels, each spatial carrier frequency component defining a synthetic grating having selected angular orientation and line spacing parameters with at least one of said parameters being different in any one of said spatial carrier frequency components from the parameters of any other of said spatial carrier frequency components, whereby said multichannel-encoded recording does not contain baseband information.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |